US8179997B2 - Real-time digital quadrature demodulation method and device for ultrasonic imaging system - Google Patents
Real-time digital quadrature demodulation method and device for ultrasonic imaging system Download PDFInfo
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- US8179997B2 US8179997B2 US12/767,642 US76764210A US8179997B2 US 8179997 B2 US8179997 B2 US 8179997B2 US 76764210 A US76764210 A US 76764210A US 8179997 B2 US8179997 B2 US 8179997B2
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003384 imaging method Methods 0.000 title claims abstract description 21
- 230000015654 memory Effects 0.000 claims abstract description 84
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000006870 function Effects 0.000 claims description 9
- 230000001131 transforming effect Effects 0.000 claims description 4
- 238000002604 ultrasonography Methods 0.000 claims 3
- 238000004364 calculation method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000005070 sampling Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
- G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
- G01S15/8979—Combined Doppler and pulse-echo imaging systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52025—Details of receivers for pulse systems
- G01S7/52026—Extracting wanted echo signals
- G01S7/52028—Extracting wanted echo signals using digital techniques
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
Abstract
Description
I1(t)=x(t)×cos(ω(t)×t)=A(t)/2(cos(Φ(t))+cos(2ω(t)×t+Φ(t)))
Q1(t)=x(t)×sin(ω(t)×t)=−A(t)/2(sin(Φ(t))−sin(2ω(t)×t+Φ(t))). (1)
I(t)=I1(t) h(t)=A(t)/2×cos(Φ(t))
Q(t)=Q1(t) h(t)=A(t)/2×sin(Φ(t)). (2)
ω0=0
ωi+1=ωi+Δθk (3)
cos Lut[i]=cos(ωi)
sin Lut[i]=sin(ωi) (4)
wherein, ωc is the cutoff frequency (i.e., the cutoff angle frequency) of the low-pass filter, and Win(n) is the window function, such as general hamming, hanning, Gaussian window etc. If ωc is assured to be k×2pi/M wherein k=0˜M−1, M is an integer power of 2, such as 256, then the product term on the left of the multiplication sign in the above equation could be obtained by looking up a sine look-up-table with the length of M (storing sine values of M angles equally divided from 0 to pi).
in the equation (5)) corresponding to the index n is obtained (step 402). The Tn=2n−
Claims (19)
Priority Applications (1)
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US12/767,642 US8179997B2 (en) | 2006-11-27 | 2010-04-26 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
Applications Claiming Priority (5)
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CN200610146980.1 | 2006-11-27 | ||
CN200610146980 | 2006-11-27 | ||
CN2006101469801A CN101190137B (en) | 2006-11-27 | 2006-11-27 | Real time digital quadrature demodulation method and device used in ultrasonic imaging system |
US11/617,959 US7706476B2 (en) | 2006-11-27 | 2006-12-29 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
US12/767,642 US8179997B2 (en) | 2006-11-27 | 2010-04-26 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
Related Parent Applications (1)
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US11/617,959 Continuation US7706476B2 (en) | 2006-11-27 | 2006-12-29 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
Publications (2)
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US20100202567A1 US20100202567A1 (en) | 2010-08-12 |
US8179997B2 true US8179997B2 (en) | 2012-05-15 |
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US11/617,959 Active 2029-01-05 US7706476B2 (en) | 2006-11-27 | 2006-12-29 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
US12/767,642 Active 2027-08-05 US8179997B2 (en) | 2006-11-27 | 2010-04-26 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
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US11/617,959 Active 2029-01-05 US7706476B2 (en) | 2006-11-27 | 2006-12-29 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system |
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US (2) | US7706476B2 (en) |
CN (1) | CN101190137B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7043082B2 (en) * | 2000-01-06 | 2006-05-09 | Canon Kabushiki Kaisha | Demodulation and phase estimation of two-dimensional patterns |
US20100004542A1 (en) | 2008-07-03 | 2010-01-07 | Texas Instruments Incorporated | System and method for ultrasound color doppler imaging |
CN101912277B (en) * | 2010-08-06 | 2013-03-27 | 深圳市蓝韵实业有限公司 | Method and device for real-time digital quadrature demodulation designed based on production line |
US9184771B2 (en) | 2011-10-12 | 2015-11-10 | Optis Cellular Technology, Llc | Digital down conversion and demodulation |
US9264282B2 (en) * | 2013-03-15 | 2016-02-16 | Innophase, Inc. | Polar receiver signal processing apparatus and methods |
US10357180B2 (en) * | 2014-01-16 | 2019-07-23 | D.T.R. Dermal Therapy Research Inc. | Health monitoring system |
KR101702260B1 (en) * | 2016-01-25 | 2017-02-13 | 임채은 | Method and apparatus for ultrasonic diagnostic |
CN110488228B (en) * | 2019-07-11 | 2021-12-07 | 中国科学院电子学研究所 | Linear frequency modulation signal generation method and device and storage medium |
Citations (6)
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---|---|---|---|---|
CN2315567Y (en) | 1998-03-13 | 1999-04-21 | 清华大学 | New supersonic Doppler blood flow detector |
CN1440726A (en) | 2002-10-01 | 2003-09-10 | 深圳迈瑞生物医疗电子股份有限公司 | Full digital ultrasonic spectral Doppler imaging method and equipment |
US6678336B1 (en) * | 1997-11-28 | 2004-01-13 | Kabushiki Kaisha Kenwood | Hierarchical transmission digital demodulator |
CN1712926A (en) | 2005-06-19 | 2005-12-28 | 中国海洋大学 | Micro-flow controlling chip for analyzing single cell algae flow |
US20080224689A1 (en) * | 2006-07-24 | 2008-09-18 | Halverson Peter G | Phase measurement device using inphase and quadrature components for phase estimation |
US7593459B1 (en) * | 2005-09-14 | 2009-09-22 | Redpine Signals, Inc. | Wireless link simulator |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5482044A (en) * | 1992-01-14 | 1996-01-09 | Diasonics Ultrasound, Inc. | Direct demodulation in ultrasound instruments |
CN100410925C (en) * | 2004-12-30 | 2008-08-13 | 中国科学院长春光学精密机械与物理研究所 | Digital signal processing method for ultrasonic signals |
-
2006
- 2006-11-27 CN CN2006101469801A patent/CN101190137B/en active Active
- 2006-12-29 US US11/617,959 patent/US7706476B2/en active Active
-
2010
- 2010-04-26 US US12/767,642 patent/US8179997B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6678336B1 (en) * | 1997-11-28 | 2004-01-13 | Kabushiki Kaisha Kenwood | Hierarchical transmission digital demodulator |
CN2315567Y (en) | 1998-03-13 | 1999-04-21 | 清华大学 | New supersonic Doppler blood flow detector |
CN1440726A (en) | 2002-10-01 | 2003-09-10 | 深圳迈瑞生物医疗电子股份有限公司 | Full digital ultrasonic spectral Doppler imaging method and equipment |
CN1712926A (en) | 2005-06-19 | 2005-12-28 | 中国海洋大学 | Micro-flow controlling chip for analyzing single cell algae flow |
US7593459B1 (en) * | 2005-09-14 | 2009-09-22 | Redpine Signals, Inc. | Wireless link simulator |
US20080224689A1 (en) * | 2006-07-24 | 2008-09-18 | Halverson Peter G | Phase measurement device using inphase and quadrature components for phase estimation |
Also Published As
Publication number | Publication date |
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US20100202567A1 (en) | 2010-08-12 |
US7706476B2 (en) | 2010-04-27 |
CN101190137B (en) | 2011-06-22 |
US20080126460A1 (en) | 2008-05-29 |
CN101190137A (en) | 2008-06-04 |
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